Improved process of preparing- elite peroxide of manganese



W, I (Little.

or, W

JAMES IV. HOBBS, OF BOSTON, MASSACHUSETTS, ASSIGNOR TO HOBBS, POPE & (30., OF SAME PLACE.

Letters Patent No. 88,570, dated April 6, 1869.

IMPROVED PROCESS OP PREPARING- BLUE PEROXIDE OI MANGANESE.

fl'ho Schedule referred to in these Letters lateu: and making part ofthe same To all whom it may concern:

Be it known that I, J AMES \V. -HOBBS, of Boston,

in the county of Suffolk, and State of Massachusetts, have invented, or discovered a new and useful Process for Converting Protoxide of Manganese and Iron, Oomhined, to Blue Peroxide of Manganese and the following is a full, clear, and exact description thereof. I Brown protoxide of iron and manganese is found in large quantities in mines where pure blue peroxide of manganese is found, but until the discovery made by me, for converting it to the latter, has been of little or no commercial value.

The value and uses of blue peroxide of manganese are well known.

Now, this brown protoxide of iron and manganese, if it could he changed to blue peroxide of manganese, would open a new source of commercial interest, increase the supply of the last-named article, and of course reduce the price, thereby'benefiting the world.

As I am largely engaged in the sale of manganese, and have seen such immense quantities of the brown protoxide of iron and manganese left as useless, and an obstruction tomining-operations, I have bestowed much study and experimenato change the character of the brown protoxide to the blue peroxide.

Processes known in chemistry did not point the way,

and it was onlyafter much labor, in experiment and study, that I discovered that, by subjecting the brown protoxide of iron andmanganese to a proper heat, in

suitable ovens, I produced the desired result.

I best accomplish this by burning, or baking the material to be changed, closely watching the intensity and application of heat, till the right hue is reached. This eliminates the oxide contained 'in the original, and the result is perfect blue manganese, of equal value with the pure.

What .I claim, therefore, as my discovery, or invention, is.-

1. The process for converting protoxide of iron and manganese,combined, to peroxide of manganese, herein described. a

2. As a new article of manufacture, peroxide of manganese, produced from protoxide of iron and manganese, combined. 7 v

In testimony whereof, I have signed my name to this specification, in the presence of two subscribing wit- LIBSSGS.

. JAMES W. HOBBS. \Vitnesses:

CARROLL D. WRIGHT, WM. CARROLL Porn. 

